Side Extension approval rate in Hounslow
Hounslow approved 88.0% of side extension applications, based on 7,894 decisions analysed.
Last updated: September 2026
88.0%
side extension approval rate
7,894
Side Extension decisions
6,948
Approved
946
Refused
88.5%
Hounslow overall
Side Extension applications are approved at roughly the same rate as the Hounslow average (88.5%).
How side extension compares in Hounslow
Side Extension
88.0%
Hounslow all applications
88.5%
Planning a side extension in Hounslow?
88.0% get approved, but the odds vary by street. Your Full Planning Analysis shows exactly what gets approved and refused near your property.
✓ Your ward's side extension approval rate
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Free planning check for Hounslow →
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Planning professional? PlanningLens runs refusal alerts and evidence packs for Hounslow and any other published UK council — see the data services →
Other project types in Hounslow
85.0%
89.7%
88.8%
90.2%
80.9%
85.5%
92.8%
94.8%
88.7%
90.0%
73.0%
89.9%
82.7%
48.3%
68.8%